Method of and apparatus for electric welding.



T. E MURRAY.

METHOD OF AND APPARATUS FOR ELECTRIC WELDING.

APPLICATION FILED IANQI. IBIS. 1,2 7,25 Patented May 21,1918.

2 SHEETSSHEET I.

, INVENTOR M 5 @ATTO NEY vT.- E. MURRAY.

METHOD OF AND APPARATUS FOR ELECTRIC WELDING.

APPLICATION FILED JAN. 21, 1918.

1,267,256. Eatenfed May 21,1918.

2 SHEETS-SHEET 2.

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INVENTOR ffw' ATTORNEY THOMAS E. MURRAY, OF NEW YORK, 'N. Y.

METHOD-OF AND APPARATUS FOR ELECTRIC WELDING.

Specification. of Letters Patent.

Patented May 21, 1918.

Application filed January 21, 1918. Serial No. 212,897.

To all whom it may concern:

Be it known that I, THOMAS E. MURRAY a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Methods of and Apparatus for Electric Welding, of which the following is a specification.

The invention is a method of and apparatus for electric welding, and more particularly for producing a projectile having means for guiding the same during-flight. The said means hereconsist of guide vanes united to the projectile, each secured at one edge to the others and radiating from a common axis.

In the accompanying drawings Figure 1 is a perspective View of a guide vane section. Fig. 2 shows the assembledvanes in cross section and in place between the electrodes which weld said vanes to- Similar numbers and letters of reference indicate like parts.

The guide vanes are here shown in four similar unit sections, one of which is shown separately in Fig. 1. Each section comprises two flat plates 1, 2, preferably integral and formed by bending a single plate longitudinally at an angle of ninety degrees. At the end of each section and integral therewith is a triangular concave plate 3, shaped to fit upon the ogival end of the projectile 4:. The

sections are placed in contact so that the four vanes radiate from a common axis, which is concentric with the cap formed unitedly by the several juxtaposed plates 3.

I unite thevane sections by first placing two of them upon the electrodes A. A, Fig. 2, with their then vertical plates 1. 1 in contact and extending downwardly through a gap between said electrodes and an opening in the table B supporting the same. The

remaining two sections are placed upon the sections already in position, with their then vertical plates 1, 1 extending upwardly through a gap between the electrodes C, C. The electrodes C. C are connected to one terminal and the electrodes A. A to the other terminal of the welding circuit. Current being established, the electrodes C, C are pressed downwardly, whereby the meeting surfaces of the sections become welded together. Circuit being broken and the electrodes C, C raised, the united sections are rotated ninety degrees and again placed between the electrodes, with the plates 2, 2

'now vertical, and the welding operation is repeated. As a result, the V-shaped plates of the four sections become welded together over their meeting surfaces.

The apparatus for welding the united guide vanes to the projectile 4 is constructed as follows:

D is a fixed sleeve bolted to the table In said sleeve is a sliding block F having recesses suitably shaped to receive the united guide vanes and cap formed by the plates 3. Any suitable mechanism not shown) may be connected to lever G pivoted in lugs to block F for moving said block longitudinally in saidsleeve. The block F forms one of the welding electrodes. The opposite electrode H is made in two parts 5,-6. lower part 6 is secured to and insulated from the table E, and on its upper side has a substantially semi-circular recess in which the projectile 4 is seated. On each side of the recess .said part 6 is shouldered and provided with upwardly extending pairs of metal clips'7. The upper portion 5 of this electrode has a similar recess to fit upon the projectile and at each side of said recess is shouldered and provided with depending contact plates 8, which. when the projectile is in place, enter the clips 9. The opposite end of the projectile is received in a suitably formed recess in a block 10. "In said end, as here shown, there is a circular opening. having a surrounding flange 11. which flange enters an annular groove in said block recess.

The block 10 is carried by a screw 12, provided with hand-wheel 13. Said screw en-.

The nut 14 being released, the block 10 is removed through opening 16, together with its screw 12 and hand-wheel 13. The projectile is inserted through saidiopening, un-

til the ogival end is seated-gin the gbuide vanes previously placed in position in lock The 6, its body portion then being received be-- tiles is effected once for all by means of the screw 12. The block F is then moved to- Ward the projectile so as firmly to press the vanes upon the ogival end, and the welding current is established between the electrodes F, H, with the result that the vanes are welded and so immovably secured to said ogival end, after which the nut 14: is again removed, and the finished projectile withv drawn through opening 16.

The center of the opening between the parts of electrode H is in line with the center of the opening in electrode 1F, so that when the projectile is inserted in said electrodes in the manner described, its longitudinal axis is in line with said centers.

I find it preferable to provide ribs 19 on the triangular plates 3, which bear upon the end of the projectile when the vanes are in place, and serve to concentrate the welding current at the welding operation.

While I have here disclosed my invention as applied to the manufacture of projectiles, it is to be understood that I do not thus limit myself, since the same is applicable to the electric welding of many difierent obects;

ll claim:

1. An electric welding apparatus, comprising a fixed annular electrode surrounding one of the bodies to be welded through which electrode said body passes, and an electrode having a recess wherein the other body is seated and movable with reference to said fixed electrode.

2. An electric welding apparatus as in claim 1, the centers of said recess in said movable electrode and of the opening in said fixed electrode being in alinement.

3. An electric welding apparatus comprising a fixed electrode surrounding one of the bodies to be Welded, and an electrode having a recess wherein the other body is seated and movable with reference to said fixed electrode, the said fixed electrode being formed in two sections electrically connected having recesses receiving said body, one of said sections being adjustable with respect to the other section.

.4. An electric welding apparatus as in claim 1, the said fixed electrode being formed in two electrically connected sections having recesses receiving said body, and, on the meeting faces of said sections respectively, contact plates and clips receiving said plates.

5. An electric welding apparatus, comprising a fixed electrode surrounding one of the bodies to be welded, and, on opposite sides of said electrode, an electrode having a recess wherein the other body is seated, and an abutment for said first-named body, the said last-named electrode being movable with reference to said fixed electrode.

6. An electric welding apparatus as in claim 5, the said abutment being adjustable with reference to said fixed electrode.

7. An electric welding apparatus as in claim 5, further comprising a fixed support having an opening through which said firstnamed body may be introduced into said electrodes, a nut covering said opening and releasably secured to said support, and a screw in-said nut and attached to said abutment.

8. An apparatus for electrically welding guide vanes to a projectile, comprising an electrode having recesses receiving said vanes, and an electrode for supporting said projectile, one of said electrodes being movable to press said guide vanes and said projectile together at the welding joint.

9. An apparatus for electrically welding guide vanes to a projectile, comprising an electrode having recesses receiving said vanes, an electrode surrounding the body portion of said projectile, and an abutment for said projectile, the said first-named electrode being movable toward said abutment to press said vanes against said projectile.

'10. The method of producing a projectile having a guide vane, which consists in, first, shaping said vane at one end in a configuration to correspond .to that of the projectile; second, electrically welding said vane at its shaped end to said projectile.

11. The method of producing a projectile having a plurality of guide vanes, which consists in, first, shaping each of said vanes at one end to a configuration to correspond to that of the projectile; second, electrically welding said vanes together at a longitudinal edge of each to radiate from a common axis; third, electrically welding said vanes at their shaped ends to said projectile.

In testimony whereof ll have afiixed my signature in presence of two witnesses.

THOMAS E. MURRAY.

Witnesses: v

GERTRUDE T. PORTER, MAY T. McGARRY.

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